Catch-bolt



UNITED srarns l PATENT OFFICE WILLIAM SALISBURY, OF WHEELING, VIRGINIA.i

CATCH-BOLT.

Specification of Letters Patent No. 26,296, dated November 29, 1859.

To all whom 'it 'may concern:

Be it known that I, W. SALISBURY, of Wheeling, in the county of Ohio andState of Virginia, have invented a new and useful Improvement inCatch-Bolts; and `I do hereby declare that the following is a full,clear, and exact description of the same, ref` erence being had to theannexed drawings, making a part of this specification, in which- Figure1, is a face view of a lock applied to a door and provided withmyinvention. Figs. 2 and 3, are horizontal sections of the same, showingtwo different positions of the parts and taken in the same line a", m,Fig. l.

Similar' letters of reference indicate corresponding parts in the twofigures.

This invention relates to an improvement in that class of` catch boltswhich are selfcatching, that is to say, those which are provided with abasil at their outer ends and are forced inward by being shoved or drawnin contact with a proper nosing as the door is closed, a spring forcingthe end of the bolt within the nosing.

The object of the invention is to avoid the friction and consequent wearattending the operation of the ordinary catch bolt, thereby renderingthe device not only much more durable, but also causing the same tocatch or operate with less noise and concussion than usual as the dooris closed.

The invention consists in attaching to an ordinary catch bolt a leverarranged and applied substantially as hereinafter def scribed, wherebythe desired end is attained.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, represents a lock which may be pro` vided with a bolt placed within acaseand arranged to be operated by a key in any of the known ways. B, isthe catch bolt `of the lock, which may also be arranged in the usual wayso as to be drawn within the lock case by the turning of a knob when thedoor is to be opened. These parts being of usual construction donotrequire a minute description.

To the upper surface of the catch boltB, a lever C, is attached by apivot a. The lever C, is nearly equal in length to the bolt B, and issecured to the latter near its inner end the lever being allowed to turnor work freely on its pivot a. The outer part of the lever C, projectsthrough the end of the lock oase and has two curved surfaces b, c, oneof which b, is precisely similar to the usual basil d, of the catchbolt, thefbasil,` or curved surface `b, howeverl of the-.lever f g C, israther fartheriinwardfthanthe basil` d, of the catch bolt so. that asthe door `is y closed the basil b, of `i;`the`, lever will strike thenosing D, on the door,frame,instead` of .l the basil d, as shown clearlyin Fig. 2. The l curved surface c, of thlelever is concave and l itbears against an uprightbar or stem` 9,131 of the lock case formed-,by aslot f," which is y made in the outer sideof thefcase. The slot w f, ismade suiciently large` to allowtheouter 701i` l part of the lever towork through as the `door l l l closes. b S d" The operation is asifollows-lVhenI the` y 1 door is closed, thebaSl 5,? ofthe, `lever bstrikes the nosing D, andthe concave curved 75 g surface c, of theAlever is pressedagainst the y, bar or stem e, and theleveris thereby`forced inward carrying `with it)I the catch q, bolt B, the outerpartsofboththe leverand catch bolt being forced` within thewnosing 1 bythe usual spring when thedoor `is closed, l see Fig. 3. By theemployment or useof 1p. a the lever C,` the catch bolt; is shoved backwithin the lock "case withfar less friction than when, thebasl d,lofsaid bolt is forced `8`51f against the nosing, for in the latter casethe' catch bolt has no lateral yielding@movement` p like the lever andconsequentlyits side, at y a point opposite itsbasil, islpressed,` asthe1 "yl door `is closed,l\directly against" thebar` or `30 stem e, atrightanglescausingdmuch fric# tion and `consequent;wear, 1b1f1t,;in` theem-` l ployment ofthelever C, the `curved surface f1 c, readilyslipsover the baror stem c, anda` purchase is obtained`whichfacilitatesfin" `af great degree the sliding'b ck of theucatch.` bolt.1` 1 The attachment `of thefl ferai@ Lto the catch bolt will notmaterially `enhancethe` cost of the lock, thefadditional` expenselbefing -quite inappreciable whentcompared with the advantages obtained byThe in vention is of course applicableto] the` catch bolt of locks or tosimple `catch bolts not con@` nected with any lock. 1 1 i l` f 105WHaving thus described my' `invention what 1 I claim as new anddesireltopsecure bykLet` ters Patent, is,

`The employment or, use`;of the lever` C, y combined and arrangedwiththecatchgbolt 1110` B, to operate substaritiallyffasfandfor the;purpose set forth. w. j 1

. SALISBUR Witnesses: i p p ff;

WILLIAM Willson y EDWARD CLAroR.`M; l y.

